Tim

const elements = document.querySelectorAll( '.nav__link, .open')
elements.forEach(element => {
   element.classList.remove('open')
})

set COMPOSER_MEMORY_LIMIT=-1 && php -d memory_limit=-1 composer.phar <...>

export COMPOSER_MEMORY_LIMIT=-1 && php -d memory_limit=-1 composer.phar <...>

document.querySelectorAll('[атрибут]').forEach(el => el.click());

const calc = document.querySelector('.calc');
calc.addEventListener('click', calcClickHandler);

function calcClickHandler(event) {
  const button = event.target.closest('button');
  if (button) {
    console.log('Click!', button);
  }
}

const newArr = arr.map(n => ({
  ...n,
  array2: n.array2.filter(mustStay),
}));

for (let i = 0; i < arr.length; i++) {
  const a = arr[i].array2;
  for (let j = 0; j < a.length; j++) {
    if (!mustStay(a[j])) {
      for (let k = j--; ++k < a.length; a[k - 1] = a[k]) ;
      a.pop();
    }
  }
}

// или

arr.forEach(n => {
  n.array2.reduceRight((_, n, i, a) => mustStay(n) || a.splice(i, 1), 0);
});

// или

(function next(i, { array2: a } = arr[i] ?? {}) {
  if (a) {
    a.splice(0, a.length, ...a.filter(mustStay));
    next(-~i);
  }
})(0);

// или

for (const { array2: a } of arr) {
  a.length -= a.reduce((acc, n, i) => (
    a[i - acc] = n,
    acc + !mustStay(n)
  ), 0);
}

const flatObj = obj =>
  Object.entries(obj).reduce((acc, [ k, v ]) => (
    v instanceof Object && !Array.isArray(v)
      ? Object.assign(acc, flatObj(v))
      : acc[k] = v,
    acc
  ), {});

function myFunc(arg) {
  return arg
}

let result = myFunc('Строка')
console.log(result) // Строка